Originally Posted by Sammy
Originally Posted by BIGGERED
Are you sure your def tank level isn’t to low?

Do you have a code reader that will clear code?

Do you know what relay(s) you need to jumper to get you 150 more miles (on one key cycle)?

Hit up a Cummins forum, it’s a modern diesel you need to be prepared!

Red




I always keep it at 100% full.
It cleared the code once then 35 miles later, no engine light but said it was going to to 5mph after the next 150 miles.
I was 450+ miles away from home yesterday.


I was digging on the Cummins forums and there was mention of letting your def tank level drop a bit as when you continually top it off the system thinks you are not using any DEF.

Something to consider!

Red